Electronic controller



FIG. 1 is left side perspective view of my design for an electronic controller;

FIG. 2 is left upper side perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof; and,

FIG. 7 is a bottom view thereof. 

The ornamental design for an electronic controller, as shown and described. 